The best birding is from March through September. Be alert for openings in the canopy and significant “sap” trees for other species. Caution: The river can be impassable during and after heavy rains. Also, the trail has several low spots for standing water and can be muddy and slippery.

A mature mesquite bosque creates shady riparian habitats. Some regular species include Yellow-billed Cuckoo, Lucy’s w\Warbler, Vermilion Flycatcher, Bell’s Vireo, Summer Tanager, Anna's Hummingbird, and Gray Hawk.

The 7B Nature Trail is an International Bird Area (IBA), the dirt trail winds under a dense mesquite canopy. The site is owned by Resolution Copper but managed by The Nature Conservancy. 

The 7B Nature Trail is about 1.5 miles long, meandering through a magnificent, mature mesquite bosque. The trail is flat with benches placed at key locations for rest and viewing.